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index.js
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index.js
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var events = require('events');
var util = require('util');
var noble = require('noble');
var STICKNFIND_UUID = 'bec26202a8d84a9480fc9ac1de37daa6';
var GENERIC_ACCESS_SERVICE_UUID = '1800';
var DEVICE_NAME_CHARACTERISTIC_UUID = '2a00';
var DEVICE_INFORMATION_SERVICE_UUID = '180a';
var MANUFACTURER_NAME_CHARACTERISTIC_UUID = '2a29';
var MODEL_NUMBER_CHARACTERISTIC_UUID = '2a24';
var SERIAL_NUMBER_CHARACTERISTIC_UUID = '2a25';
var HARDWARE_REVISION_CHARACTERISTIC_UUID = '2a27';
var SOFTWARE_REVISION_CHARACTERISTIC_UUID = '2a28';
var ALERT_LEVEL_SERVICE_UUID = '1802';
var ALERT_LEVEL_CHARACTERISTIC_UUID = '2a06';
var TX_POWER_SERVICE_UUID = '1804';
var TX_POWER_LEVEL_CHARACTERISTIC_UUID = '2a07';
var LINK_LOSS_SERVICE_UUID = '1803';
var BATTERY_SERVICE_UUID = '180f';
var BATTERY_LEVEL_CHARACTERISTIC_UUID = '2a19';
function StickNFind(peripheral) {
this._peripheral = peripheral;
this._services = {};
this._characteristics = {};
this.uuid = peripheral.uuid;
this._peripheral.on('disconnect', this.onDisconnect.bind(this));
}
util.inherits(StickNFind, events.EventEmitter);
StickNFind.discover = function(callback) {
noble.once('stateChange', function() {
var onDiscover = function(peripheral) {
if (peripheral.advertisement.localName === 'StickNfind') {
noble.removeListener('discover', onDiscover);
noble.stopScanning();
var sticknfind = new StickNFind(peripheral);
callback(sticknfind);
}
};
noble.on('discover', onDiscover);
noble.startScanning(); //[STICKNFIND_UUID], true);
});
};
StickNFind.prototype.connect = function(callback) {
this._peripheral.connect(callback);
};
StickNFind.prototype.disconnect = function(callback) {
this._peripheral.disconnect(callback);
};
StickNFind.prototype.onDisconnect = function() {
this.emit('disconnect');
};
StickNFind.prototype.discoverServicesAndCharacteristics = function(callback) {
this._peripheral.discoverAllServicesAndCharacteristics(function(error, services, characteristics) {
if (error === null) {
for (var i in services) {
var service = services[i];
var serviceUuid = service.uuid;
this._services[serviceUuid] = service;
this._characteristics[serviceUuid] = {};
for(var j in services[i].characteristics) {
var characteristic = services[i].characteristics[j];
this._characteristics[serviceUuid][characteristic.uuid] = characteristic;
}
}
}
callback();
}.bind(this));
};
StickNFind.prototype.writeCharacteristic = function(serviceUuid, characteristicUuid, data, callback) {
this._characteristics[serviceUuid][characteristicUuid].write(data, false, callback);
};
StickNFind.prototype.readCharacteristic = function(serviceUuid, characteristicUuid, callback) {
this._characteristics[serviceUuid][characteristicUuid].read(function(error, data) {
callback(data);
});
};
StickNFind.prototype.readStringCharacteristic = function(serviceUuid, characteristicUuid, callback) {
this.readCharacteristic(serviceUuid, characteristicUuid, function(data) {
callback(data.toString());
});
};
StickNFind.prototype.writeStringCharacteristic = function(serviceUuid, characteristicUuid, string, callback) {
this.writeCharacteristic(serviceUuid, characteristicUuid, new Buffer(string), callback);
};
StickNFind.prototype.readDeviceName = function(callback) {
this.readStringCharacteristic(GENERIC_ACCESS_SERVICE_UUID, DEVICE_NAME_CHARACTERISTIC_UUID, callback);
};
StickNFind.prototype.writeDeviceName = function(deviceName, callback) {
this.writeStringCharacteristic(GENERIC_ACCESS_SERVICE_UUID, DEVICE_NAME_CHARACTERISTIC_UUID, deviceName, callback);
};
StickNFind.prototype.readManufacturerName = function(callback) {
this.readStringCharacteristic(DEVICE_INFORMATION_SERVICE_UUID, MANUFACTURER_NAME_CHARACTERISTIC_UUID, callback);
};
StickNFind.prototype.readModelNumber = function(callback) {
this.readStringCharacteristic(DEVICE_INFORMATION_SERVICE_UUID, MODEL_NUMBER_CHARACTERISTIC_UUID, callback);
};
StickNFind.prototype.readSerialNumber = function(callback) {
this.readStringCharacteristic(DEVICE_INFORMATION_SERVICE_UUID, SERIAL_NUMBER_CHARACTERISTIC_UUID, callback);
};
StickNFind.prototype.readHardwareRevision = function(callback) {
this.readStringCharacteristic(DEVICE_INFORMATION_SERVICE_UUID, HARDWARE_REVISION_CHARACTERISTIC_UUID, callback);
};
StickNFind.prototype.readSoftwareRevision = function(callback) {
this.readStringCharacteristic(DEVICE_INFORMATION_SERVICE_UUID, SOFTWARE_REVISION_CHARACTERISTIC_UUID, callback);
};
StickNFind.prototype.readAlertLevelFromService = function(serviceUuid, callback) {
this.readCharacteristic(serviceUuid, ALERT_LEVEL_CHARACTERISTIC_UUID, function(data) {
var alertLevel = 'unknown';
if (data[0] === 0x00) {
alertLevel = 'none';
} else if (data[0] === 0x01) {
alertLevel = 'mild';
} else if (data[0] === 0x02) {
alertLevel = 'high';
}
callback(alertLevel);
});
};
StickNFind.prototype.writeAlertLevelToService = function(serviceUuid, alertLevel, callback) {
var level = 0;
if (alertLevel === 'mild') {
level = 0x01;
} else if (alertLevel === 'high') {
level = 0x02;
}
this.writeCharacteristic(serviceUuid, ALERT_LEVEL_CHARACTERISTIC_UUID, new Buffer([level]), function() {
callback();
});
};
StickNFind.prototype.readAlertLevel = function(callback) {
this.readAlertLevelFromService(ALERT_LEVEL_SERVICE_UUID, callback);
};
StickNFind.prototype.writeAlertLevel = function(alertLevel, callback) {
this.writeAlertLevelToService(ALERT_LEVEL_SERVICE_UUID, alertLevel, callback);
};
StickNFind.prototype.readLinkLossAlertLevel = function(callback) {
this.readAlertLevelFromService(LINK_LOSS_SERVICE_UUID, callback);
};
StickNFind.prototype.writeLinkLossAlertLevel = function(alertLevel, callback) {
this.writeAlertLevelToService(LINK_LOSS_SERVICE_UUID, alertLevel, callback);
};
StickNFind.prototype.readTxPowerLevel = function(callback) {
this.readCharacteristic(TX_POWER_SERVICE_UUID, TX_POWER_LEVEL_CHARACTERISTIC_UUID, function(data) {
callback(data.readInt8(0));
});
};
StickNFind.prototype.readBatteryLevel = function(callback) {
this.readCharacteristic(BATTERY_SERVICE_UUID, BATTERY_LEVEL_CHARACTERISTIC_UUID, function(data) {
callback(data.readUInt8(0));
});
};
module.exports = StickNFind;